Question on 2.5 ghz cordless phone antennas

You often see old cordless phones tossed out on junk day or at fleamarkets for a few cents.

Can the antennas on these be used for wifi projects?

What dBi would they be (handpiece v's the basestation).

Just thinkin :-)

Cheers

Rob

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me here
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"me here" hath wroth:

Yep. The battery dies, so the owner just throws away the whole cordless phone instead of buying a replacement.

No. The lack of a proper RP-SMA or RP-TNC is the major problem. If you disassemble the cordless phone, what you'll probably find is a

1/4 wave piece of wire inside a rubber or plastic antenna "radome". 1/4 wave at 2.4GHz is about 3.125". The antenna can be approximately this length, or twisted into a spring shape.
1/4 wave, under ideal circumstances is about 0dBi. If the antenna looks like a spring and is (for example) half the 1/4 wave length, then the gain is -3dBi.

You'll do better to make your own directional antenna from scratch.

Reply to
Jeff Liebermann

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